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EN 1.4057 (X17CrNi16-2) Stainless Steel

EN 1.4057 stainless steel is a martensitic stainless steel formulated for primary forming into wrought products. 1.4057 is the EN numeric designation for this material. X17CrNi16-2 is the EN chemical designation.

The properties of EN 1.4057 stainless steel include three common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare EN 1.4057 stainless steel to: wrought martensitic stainless steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Elastic (Young's, Tensile) Modulus

200 GPa 28 x 106 psi

Elongation at Break

11 to 17 %

Fatigue Strength

320 to 430 MPa 47 to 62 x 103 psi

Impact Strength: V-Notched Charpy

16 to 21 J 11 to 16 ft-lb

Poisson's Ratio

0.28

Shear Modulus

77 GPa 11 x 106 psi

Shear Strength

520 to 580 MPa 76 to 84 x 103 psi

Tensile Strength: Ultimate (UTS)

840 to 980 MPa 120 to 140 x 103 psi

Tensile Strength: Yield (Proof)

530 to 790 MPa 76 to 120 x 103 psi

Thermal Properties

Latent Heat of Fusion

280 J/g

Maximum Temperature: Corrosion

400 °C 760 °F

Maximum Temperature: Mechanical

850 °C 1560 °F

Melting Completion (Liquidus)

1440 °C 2620 °F

Melting Onset (Solidus)

1390 °C 2540 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

25 W/m-K 14 BTU/h-ft-°F

Thermal Expansion

10 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

2.5 % IACS

Electrical Conductivity: Equal Weight (Specific)

2.9 % IACS

Otherwise Unclassified Properties

Base Metal Price

9.5 % relative

Density

7.7 g/cm3 480 lb/ft3

Embodied Carbon

2.2 kg CO2/kg material

Embodied Energy

32 MJ/kg 14 x 103 BTU/lb

Embodied Water

120 L/kg 14 gal/lb

Common Calculations

PREN (Pitting Resistance)

16

Resilience: Ultimate (Unit Rupture Work)

96 to 130 MJ/m3

Resilience: Unit (Modulus of Resilience)

700 to 1610 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

30 to 35 points

Strength to Weight: Bending

26 to 28 points

Thermal Diffusivity

6.7 mm2/s

Thermal Shock Resistance

30 to 35 points

Alloy Composition

Among wrought stainless steels, the composition of EN 1.4057 stainless steel is notable for containing comparatively high amounts of chromium (Cr) and nickel (Ni). Chromium is the defining alloying element of stainless steel. Higher chromium content imparts additional corrosion resistance. Nickel is primarily used to achieve a specific microstructure. In addition, it has a beneficial effect on mechanical properties and certain types of corrosion.

Iron (Fe) 77.7 to 83.4
Chromium (Cr) 15 to 17
Nickel (Ni) 1.5 to 2.5
Manganese (Mn) 0 to 1.5
Silicon (Si) 0 to 1.0
Carbon (C) 0.12 to 0.22
Phosphorus (P) 0 to 0.040
Sulfur (S) 0 to 0.015

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

EN 10272: Stainless steel bars for pressure purposes

EN 10250-4: Open die steel forgings for general engineering purposes - Part 4: Stainless steels

EN 10088-3: Stainless steels - Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes

EN 10088-1: Stainless steels - Part 1: List of stainless steels

Corrosion of Stainless Steels, A. John Sedriks, 1996

Advances in Stainless Steels, Baldev Raj et al. (editors), 2010

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015